Artificial lung



FIG. 1 is a perspective view of an artificial lung showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a bottom plan view thereof; and

FIG. 8 is a cross-sectional view thereof taken along the line VIII--VIII in FIG. 2. 

The ornamental design for an artificial lung, as shown and described. 